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首页> 外文期刊>Plant and Soil >Soil microbes drive the effect of plant species and genotypic diversity interaction on productivity.
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Soil microbes drive the effect of plant species and genotypic diversity interaction on productivity.

机译：土壤微生物驱动植物物种和基因型多样性相互作用对生产力的影响。

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Purpose The effect of plant species and genotypic diversity on productivity has been well documented but little is known about the contribution of the interaction between species and genotypic diversity. Since the influence of soil microorganisms on the plant diversity-productivity relationship is increasingly recognized, we investigated potential interactions between plant species diversity, plant genotypic diversity and soil microbes. We hypothesized that the non-additive effects of plant species and genotypic diversity on productivity could be microbe-driven. Methods We set up pea and wheat monocultures and mixtures in a growth chamber, varying for their levels of genotypic diversity under three different soil microbial contexts. We assessed plant shoot and root biomass production, soil mineral nitrogen content and described the soil bacterial communities. Results We found that shoot biomass in mixtures involving both species and genotypic diversity was higher than expected considering the additive effects of plant species diversity and genotypic diversity. Rather than a synergy between two positive effects of species and genotypic diversity, we observed that species mixture compensated the negative effect of genotypic diversity. Regarding microbial influence, we found that the effect of plant species diversity, plant genotypic diversity and their interaction on productivity were all driven by the soil microbial community as no effect was observed in a pre-sterilised soil. Conclusion Our study suggests that the plant diversity-productivity relationship could be shaped by a three-way interaction between plant species diversity, plant genotypic diversity and soil microbes. Thus, plant-microbe and plant-plant interactions could be a determinant of the plant diversity-productivity relationship.
机译：目的 植物物种和基因型多样性对生产力的影响已有充分的文献记载，但对物种间相互作用和基因型多样性的贡献知之甚少。随着土壤微生物对植物多样性-生产力关系的影响日益得到认识，本文研究了植物物种多样性、植物基因型多样性和土壤微生物之间的潜在相互作用。我们假设植物物种和基因型多样性对生产力的非累加效应可能是微生物驱动的。方法 将豌豆和小麦的单一栽培和混合物设置在生长室中，在三种不同的土壤微生物背景下，豌豆和小麦的基因型多样性水平各不相同。我们评估了植物地上部和根系生物量的产生，土壤矿物氮含量，并描述了土壤细菌群落。结果 考虑到植物物种多样性和基因型多样性的叠加效应，发现同时涉及物种和基因型多样性的混合物中芽生物量高于预期。我们观察到物种混合补偿了基因型多样性的负面影响，而不是物种和基因型多样性的两种积极影响之间的协同作用。在微生物影响方面，我们发现植物物种多样性、植物基因型多样性及其相互作用对生产力的影响都是由土壤微生物群落驱动的，因为在预先灭菌的土壤中没有观察到影响。结论 本研究表明，植物物种多样性、植物基因型多样性和土壤微生物之间的三向交互作用可能塑造了植物多样性-生产力关系。因此，植物-微生物和植物-植物相互作用可能是植物多样性-生产力关系的决定因素。

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